Overload and weightlessness
Answers are for parents and teachers.
1
m = 70 kg, a = 2 m/s² up (g = 10). P (N)?
840
2
m = 70 kg, a = 2 m/s² down. P (N)?
560
3
When does P = mg?
When the support is at rest or moving uniformly (a = 0).
4
Why does a diver feel nearly weightless in the air?
Only gravity acts in the air; there is no pressure on a support — free fall.
5
Why is it recommended to fasten your seat belt on a flight?
Strong accelerations and jolts can occur; the belt prevents injury.